User manual MARTIN AUDIO C.6.8T

[. . . ] C4. 8T, C. 6. 8T, C8. 1T User's Guide The Martin Experience All material © 2007. Subject to change without notice. Installation Guide Martin Audio Ceiling Loudspeakers C4. 8T, C6. 8T, C8. 1T Description Martin Audio C4. 8T, C6. 8T and C8. 1T ceiling loudspeakers are all 2-way designs using soft dome tweeters for the widest dispersion and excellent off-axis performance. [. . . ] All models are fitted with a thermal fuse to prevent the loudspeaker from short circuiting and disabling other loudspeakers in its group under the influence of fire. Model C4. 8T C6. 8T C8. 1T Drivers 4"(100mm) LF 0. 75"(19mm) HF 6. 5"(165mm) LF 0. 75"(19mm) HF 8"(200mm) LF 1"(25mm) HF Dispersion 180deg 150deg 90deg The exceptionally wide mid-high dispersion of the Martin Audio C4. 8T and C6. 8T makes them particularly suitable for low ceilings. Voltage & power settings All models are 16ohms direct or via line transformers selected with a baffle-mounted switch for 100V or 70V operation as follows: Baffle switch (C6. 8T shown) Model C4. 8T C6. 8T C8. 1T 16ohm 40W 75W 125W Baffle switch location 100V operation 25W, 12. 5W, 6W 40W, 20W, 10W 60W, 30W, 15W 70V operation 25W, 12. 5W, 6W, 3W 40W, 20W, 10W, 5W 60W, 30W, 15W, 7. 5W All material © 2007. Subject to change without notice. Note that all models are protected with a PTC (positive temperature coefficient) device and will quieten, if overdriven. The PTC device will reset itself once the signal is reduced to a more sensible level. Installation Ceiling loudspeaker with C-bracket and tile rails (foreground) Please note carefully Martin Audio ceiling loudspeakers must be installed by experienced ceiling loudspeaker installation personnel using the full installation kit provided The installer must check with all relevant local, national and international electrical, fire and building safety authorities to ensure that all regulations are being complied with Every ceiling loudspeaker must be fitted with a steel safety wire between its rear can safety tag and a suitable overhead supporting structure to provide backup support in the event of ceiling damage When installed in an air handling space the steel cover plates must be sealed to the loudspeaker back cans with firestop putty or a suitable alternative to ensure plenum tight enclosure of the electrical connections Step 1 Cut the ceiling hole as follows using the template provided: C4. 8T 178mm dia cut-out C6. 8T 224mm dia cut-out C8. 1T 308mm dia cut-out All material © 2007. Subject to change without notice. Suitable hole cutting methods will depend on the ceiling structure, local conditions, personnel, equipment etc and must be determined by the installer. Step 2 Place a tile rail either side of the ceiling hole and clip the C-bracket over the upright edges of the tile rails. Note the rail orientations ­ outwards for the C4. 8T and C6. 8T, inwards for the C8. 1T. C4. 8T & C6. 8T rail orientation (rails placed outwards) C-bracket clipped over rail C8. 1T rail orientation (rails placed inwards) C-bracket clipped over rail All material © 2007. Subject to change without notice. Note that the tile rail ends may be reshaped to suit your particular ceiling structure. Tile rail end Step 3 Screw the C-bracket to the tile rails with the screws provided. C-bracket screwed to tile rail Step 4 Place the loudspeaker into the ceiling hole (and through the centre of the C-bracket) from the underside. Align the loudspeaker so that an imaginary line between the woofer and tweeter runs along the corridor or concourse. This provides the smoothest sound coverage. All material © 2007. [. . . ] This warranty is exclusive and no other warranty is expressed or implied. This warranty does not affect your statutory rights. This publication is copyright © 2007 Martin Audio Ltd. All material © 2007. [. . . ]